When the people had seen the miracle that Christ did in feeding so many with so few loaves, they felt sure that He was one of the old prophets that had come again, and they would have taken Him by force to make Him king. So He sent His disciples by boat towards Capernaum, and He went, alone, up into a mountain to pray.
When it was dark, the disciples found themselves alone upon the sea, opposed to strong winds, which tossed the boat upon high waves. Then Jesus went out to them, walking upon the waves; but when the disciples saw Him they thought it was a spirit, and cried out with fear. But Jesus said, "Be of good cheer: it is I; be not afraid." Peter answered Him, saying, "Lord, if it be Thou, bid me come unto Thee on the water." And He said, "Come," and Peter stepped over the boat's side and walked on the water towards Christ. But when he saw the angry waves around him and heard the roaring of the winds, Peter was afraid and began to sink. He cried out, "Lord, save me." And Jesus, stretching out His hand, caught him, and said, "O thou of little faith, why didst thou fear?"
When Jesus and Peter had got into the boat, the wind dropped, the sea became calm and the waves still, and immediately they were at the place where they wanted to land. Then they worshipped him, saying, "Truly Thou art the Son of God." And they came into the land of Gennesaret, where the people knew Him and brought to Him all that were sick, or blind, or lame, that they might touch His garment and be made well.
Excerpted from Mother Stories from the New Testament, by Anonymous (public domain; org. printed in 1906), under the title, "Christ Walking on the Sea"